Studies in General Psychology, Vol. II: Edited by Christian A. Ruckmick. University of Iowa Studies in Psychology. Psychological Monographs. Psychological Review Publications, Vol. XLVIII, No. 2, 1936. 73 pp.

This monograph is devoted to further applications of psychogalvanic technique to the measure of 'feeling and emotion' and represents a continuation of earlier studies of the Iowa group in this field. The term electrodermal response (EDR) is suggested to replace the more frequently used psychogalvanic reflex. The

history of the use of the psychogalvanometer is briefly reviewed with pertinent references including those of contributions from this laboratory. It is pointed out that whereas the instrument was originally used to measure the strength of isolated reactions, this procedure has recently been replaced by the more comprehensive study of the pattern of reactions. Ruckmick carried this further into an investigation of continuous responses by use of music, and one of the authors of this series, D. Ulrich Greenwald, devised a method of recording these continuous reactions.

The technical work is original and carefully executed and recorded. The material is interestingly presented and makes an appeal to both the general reader and the investigator in psychological medicine. The analyst who is interested in instrumental measurement of emotional responses will find the papers well worth careful study, as the method of continuous recording described should have direct application in studying analytic hours.

The source of stimulation for continuous study was a series of silent moving pictures chosen for the particular group investigated. Each subject, examined individually, had his left palm in contact with the electrode while looking at the picture. The investigator could watch the subject through glass while tending to the apparatus in an adjoining room. The subject was instructed to mention any bodily sensations, affective reactions or ideas that occurred during the showing. His remarks were communicated by appropriate apparatus to the investigator who indicated the electrodermal response at the appropriate point on a photographic record. This data was sync